When are rattlesnakes generally most active during the spring and fall months?

Answer

During the day, especially morning or late afternoon

Since rattlesnakes are ectotherms, their activity is dictated by temperature; during spring and fall, they are often most active during the day, particularly in the morning or late afternoon, as they bask to regulate their body temperature.

When are rattlesnakes generally most active during the spring and fall months?
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